Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0644—One-way valve
  • F16K31/0655—Lift valves

Definitions

• the invention relates to a shutoff valve comprising a stationary and a movable member, where the movable member at least comprises a primary means, such as the valve disk, and a secondary means, such as the valve shaft.
• US-PS No. 4,790,346 discloses a shutoff valve with a rotatable valve disk staggered relative to the outlet in such a manner that the sealing applies to different loca ⁇ tions on the gasket and further such that the valve re ⁇ quires less opening force.
• the valve disk of such a valve does not communicate continuously with the valve shaft forming the anchoring means in a solenoid, the movement of the anchoring means relative to the valve disk is minimal.
• US-PS No. 4,449,691 discloses an electromagnet activating a valve, and whereby a spring arrangement reduces the acce ⁇ leration effects on both the valve seat and the valve disk. Despite the latter measures, the anchoring means does not move a long distance before the valve is activated.
• the object of the invention is to provide a shutoff valve of the above type, where the amount of energy necessary for activating the shutoff valve is minimized, and where the activating energy is independent of the pressure conditions to a higher degree than previuosly, said pressure condi ⁇ tions applying on both sides of the valve disk.
• the shutoff valve according to the invention is character- ised in that immediately before the valve is opened or closed, the secondary valve means is moved through almost the entire lift of the valve and consequently relative to both the stationary valve member and to the primary valve means, and that the primary valve means is not moved until after said movement of the secondary valve means. In this manner it is rendered possible by way of a slight force to supply an amount of energy sufficient for accelerating and consequently for moving the secondary valve means rela- tive to the stationary member and the primary means. Simul ⁇ taneously, it is possible to achieve a good grip on or in the means activating the valve.
• An embodiment of the shutoff valve according to the inven ⁇ tion is characterised in that the primary and the seconda- ry valve means are interconnected through at least one driving means and through at least one carrier means.
• the driving means can be prestressed during the movement of the secondary valve means relative to the primary valve means.
• the primary valve means and the secondary valve means are rigidly interconnected in the opening or closing moment.
• the primary valve means of the shutoff valve may substantially be made of a neutral or a non-magnetic material
• the secondary valve means may substantially be made of magnetic or magnetizable material, whereby the secondary valve means can be moved by means of a magnet simultaneously with the primary valve means being manufacturable of relatively light materials, such as aluminum.
• both the primary valve means and the secondary valve means may substantially be made of a magnetic or magnetizable material, whereby the effect of the driving means can be reduced.
• the driving means com ⁇ prises a resilient means, such as a spring, and the carrier means is formed by a flange.
• the shutoff valve may be characterised in that the movable member comprises a shaft, a secondary spring, a carrier ring, a valve disk, a valve gasket, a primary spring, a locking ring and a rubber knob, whereby a simple structure of the shutoff valve is obtained.
• the secondary spring is less resilient than the primary spring, and the valve is moved by means of a solenoid.
• shutoff valve may according to the invention be characterised in that the movement of the secondary valve means before the opening or closing of the valve corresponds to more than approximately 70% of the lift, preferably between approximately 70% and approximately 90% of the lift, especially approximately 80% of the lift. In this manner sufficient energy is stored in the secondary valve means with the result that the primary valve means can open even when subjected to very strong counterpres- sures .
• Fig. 1 is a perspective view of a shutoff valve according to the invention
• Fig. 2 is a partially sectional view on a larger scale of the shutoff valve of Fig. 1,
• Fig. 3 illustrates the valve arrangement of Fig. 2
• Fig. 4 in princpiple the position of the anchoring means when the valve is closed and immediately before said valve is being opened.
• the shutoff valve is generally designated the reference numeral 1, cf. Fig. 1, and comprises a stationary 2 and a movable member 3, where the movable member 3 in turn com- prises a valve disk 51, a valve shaft 61, a carrier ring 53, a valve gasket 55, at last two torsion springs - a primary 67 and a secondary 65 torsion spring - a rubber knob 69 and a locking ring 66, cf. Figs. 2 and 3.
• the shaft 61 of the valve is magnetizable, and the primary spring 67 is arranged inside the valve shaft 61, said primary spring 67 usually providing the force keeping the valve closed.
• the force of the primary spring is such that the valve can be kept closed despite the surface forces caused by the pressure conditions applying on both sides of the closing area of the valve at the same time as the solenoid 40 is capable of opening the valve.
• the secon ⁇ dary spring is such that it is capable of ensuring that the primary valve means is kept pressed against the secon ⁇ dary valve means when the valve is open.
• the rubber knob 69 is placed inside the primary spring 67 in the shaft 61, said rubber knob dampening the impact effect of the anchoring means inside the solenoid 40 as well as ensuring a release of the valve in connection with a drop in ten ⁇ sion.
• the movable members of the valve are formed by the primary means and the secondary means, where the primary means may either be magnetizable or unmagnetizable , and where the secondary means usually is magnetizable.
• the primary means and the secondary means communicate by way of a spring arrangement in such a manner that the secondary means can be moved relative to the primary means .
• the movable member of the valve may comprise more than two mutually movable means.
• the valve may be magnetically, electrically, hydraulicly or purely mechanically activated.
• the magnetic activation can be carried out by means of a movable magnet or a movable core, optionally a movable coil.
• various ways are provided for optimizing the force/position function by means of lengths of tubes 30, 31, such as steel 31, and inclining surfaces 33 on the anchoring means inside the solenoid, cf. Fig. 4.
• a low copper consumption is aimed at in connection with the magnetic coil in order to minimize the costs.
• a low consumption of power is aimed at both during the activating procedure and during the follow ⁇ ing maintaining of the open or closed position of the valve.
• the valve may be hydraulicly activated either by means of oil, air or another fluid. It may also be of interest to minimize the necessary activating power. When the valve is mechanically activated, it may also be of interest to minimize the activating force. The latter can also be achieved by the above hammering effect.
• the object of all the above measures is to ensure a reason ⁇ able ratio of often contradicting factors, such as pressure ratios in the valve and activating force, both with respect to costs and size.
• the pressures on the input side are usually in the range of 10 mbar to 100 mbar, but the valve according to the invention is capable of operat ⁇ ing at an input pressure of up to about 600 mbar without increasing the magnetic system. It is possible to ensure a blocking for counterpressures - i.e. on the output side- of about 150 mbar. Provisions also apply to the tension necessary for activating the valve as well as to the tension at which the valve must close, such as in connec ⁇ tion with a drop in tension.
• the voltages are alternating current or direct current directly on the magnetic valve.
• the invention is not limited to the above embodiments but may be varied in many ways without thereby deviating from the scope thereof.
• a slight movement - substan ⁇ tially less than 80% of the lift - can also cause an effect.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Magnetically Actuated Valves (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8113852

Family Applications (1)

Country Status (5)

Citations (6)

• 1989
  • 1989-05-29 DK DK262289A patent/DK161904C/da not_active IP Right Cessation
• 1990
  • 1990-05-29 AU AU57474/90A patent/AU5747490A/en not_active Abandoned
  • 1990-05-29 DE DE69017210T patent/DE69017210T2/de not_active Expired - Fee Related
  • 1990-05-29 EP EP90908933A patent/EP0474738B1/de not_active Expired - Lifetime
  • 1990-05-29 WO PCT/DK1990/000132 patent/WO1990015277A1/en active IP Right Grant

Patent Citations (6)

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